#304CA3#304CA3

#304CA3 is a dark, vivid blue. Relative luminance 0.084; OKLCH L 44.6% C 0.145 H 266.9°. Best body text is #FFFFFF at 7.81:1 contrast (WCAG AA passes).

Color values

HEX	#304CA3
RGB	rgb(48, 76, 163)
HSL	hsl(225, 55%, 41%)
HSV	hsv(225, 71%, 64%)
CMYK	cmyk(70.6%, 53.4%, 0%, 36.1%)
CIE-LAB	lab(34.88, 19.91, -50.21)
CIE-LCH	lch(34.88, 54.01, 291.63°)
OKLab	oklab(44.59% -0.0077 -0.1444)
OKLCH	oklch(44.59% 0.145 266.9)
XYZ	xyz(10.4119, 8.4406, 35.7237)
Luminance	0.0844 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#304CA3 #A38730

analogous

#3086A3 #304CA3 #4E30A3

triadic

#304CA3 #A3304C #4CA330

tetradic

#304CA3 #A33086 #A38730 #30A34E

square

#304CA3 #A33086 #A38730 #30A34E

split-complementary

#304CA3 #A34E30 #86A330

monochromatic

#142044 #223674 #304CA3 #4767C9 #778ED7

Accessibility & contrast

On white

7.81

#304CA3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.69

#304CA3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #304CA3

7.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##304CA3	#FFFFFF	#000000	##FFFFFF
##304CA3	1.00	7.81	2.69	7.81
#FFFFFF	7.81	1.00	21.00	1.00
#000000	2.69	21.00	1.00	21.00
##FFFFFF	7.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1158A6

Deuteranopia (green-blind)

#004DA1

Tritanopia (blue-blind)

#006170

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #304ca3;
/* rgb */ color: rgb(48, 76, 163);
/* oklch */ color: oklch(44.6% 0.145 266.9);

Tailwind

colors: {
  custom: {
    50: '#777dbf',
    500: '#304ca3',
    950: '#000000',
  },
}

SCSS

$custom: #304ca3;
$custom-light: #777dbf;
$custom-dark: #000000;

JSON

{
  "hex": "#304ca3",
  "rgb": {
    "r": 48,
    "g": 76,
    "b": 163
  },
  "hsl": {
    "h": 225.391,
    "s": 54.502,
    "l": 41.373
  },
  "oklch": {
    "l": 0.44593,
    "c": 0.14457,
    "h": 266.9
  },
  "luminance": 0.08442
}

Semantic roles & 50–950 ramp

primary

#304CA3

secondary

#BFAC70

accent

#BA4ADE

background

#F7F7FB

surface

#EEEEF7

border

#C9C9D0

text

#0A0912

muted

#7C7B81

Preview Lab

Preview with #304CA3

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →